apps/projects: do not use deprecated property days_left from a4 - fix…

euth/projects/templates/euth_projects/includes/project_hero_unit.html

@@ -1,4 +1,4 @@
-{% load thumbnail react_follows project_tags i18n rules %}
+{% load thumbnail react_follows project_class_tags i18n rules %}
 
 <header class="herounit" style="{% if project.image %}
                background-image: url({{ project.image |thumbnail_url:'heroimage' }});
@@ -7,7 +7,7 @@
         <div class="container-narrow">
             <div class="herounit-header">
 
-                {% get_days project.days_left as days %}
+                {% get_days project as days %}
                 <p>
                     {% if project.is_private %}
                     <span class="badge badge-private">{% trans 'private' %}</span>

euth/projects/templates/euth_projects/includes/project_list_item.html

@@ -1,9 +1,9 @@
-{% load i18n project_tags thumbnail follow_tags %}
+{% load i18n project_class_tags thumbnail follow_tags %}
 {% get_class project as class %}
 <div class="teaserlist-item {{ class }} {% if not project.image %} no-image {% endif %}"
      style="{% if project.image %}background-image: url({{ project.image|thumbnail_url:'heroimage_preview' }}){% endif %}">
     <div class="teaserlist-body">
-        {% get_days project.days_left as days %}
+        {% get_days project as days %}
         <p>
             {% if project.is_private %}
                 <span class="badge badge-private">{% trans 'private' %}</span>

euth/projects/templates/euth_projects/includes/project_tile.html

@@ -1,12 +1,12 @@
-{% load i18n project_tags project_class_tags thumbnail static %}
+{% load i18n project_class_tags thumbnail static %}
 {% get_class project as class %}
 
 <div class="project-tile project-tile-{{ class }} {% if not project.image %} project-tile-no-image {% endif %}">
     <a href="{% url 'project-detail' project.slug %}" class="project-tile-image-link"
        style="background-image: url('{% if project.image %} {{ project.image|thumbnail_url:'project_thumbnail' }} {% else %}{% static "images/placeholder.png" %}{% endif %}');" {% if open_in_new_tab %}target="_blank"{% endif %}>
         <img src="{% if project.image %} {{ project.image|thumbnail_url:'project_thumbnail' }} {% else %}{% static "images/placeholder.png" %}{% endif %}" class="project-tile-image img-fluid">
 
-        {% get_days project.days_left as days %}
+        {% get_days project as days %}
         {% if project.is_archived %}
         <p class="badge badge-archived">{% trans 'archived' %}</p>
         {% elif project.is_private %}

euth/projects/templatetags/project_class_tags.py

@@ -1,19 +1,53 @@
 from django import template
+from django.utils import timezone
+from django.utils.translation import gettext as _
+from django.utils.translation import ngettext
 
 from adhocracy4.projects.enums import Access
 
 register = template.Library()
 
 
+def days_left(project):
+    """
+    Replaces the project property days_left that was removed from a4.
+    Still uses the active_phase property, which is deprecated.
+    """
+    active_phase = project.active_phase
+    if active_phase:
+        today = timezone.now().replace(hour=0, minute=0, second=0)
+        time_delta = active_phase.end_date - today
+        return time_delta.days
+    return None
+
+
 @register.simple_tag
 def get_class(project):
     if project.is_archived:
         return 'archived'
-    elif project.access == Access.PRIVATE:
+    elif (project.access == Access.PRIVATE
+          or project.access == Access.SEMIPUBLIC):
         return 'private'
     elif project.has_finished:
         return 'finished'
-    elif project.days_left is not None and project.days_left <= 5:
+    elif days_left(project) is not None and days_left(project) <= 5:
         return 'running-out'
     else:
         return 'public'
+
+
+@register.simple_tag
+def get_days(project):
+    number = days_left(project)
+    if number and number >= 1 and number <= 5:
+        text = ngettext(
+            '%(number)d day left',
+            '%(number)d days left',
+            number) % {
+            'number': number,
+        }
+        return text
+    elif number == 0:
+        return _('a few hours left')
+    else:
+        return ''